I knew CASA was a thing but had never heard of this. Thank you for sharing.

You are right. 45 billion LY is the furthest distance we can see in any direction, meaning the diameter of the observable universe is 90 billion LY across.

I'd also add that construction sites are major targets of theft. Boarding up windows not only makes entry harder, but it makes it harder to scope out items to steal.

It is also worth noting that mitochondrial eve can change over time. Say this person had 2 daughters and at some point it just so happens that all of those descended from daughter 2 die out. Then daughter 1 now becomes mitochondrial eve, since that is now the most recent common ancestor.

Obviously our math isn't getting us precise enough to detect that single generational change. But recognizing mitochondrial eve is a concept (whoever the current most recent common female ancestor is) rather than a person (that gal named Ugh Ugh who lived in that cave over there) is helpful. It is pointing at an individual at a time, but that individual can change as human populations change and matrilineal lines die out.

Yup. If you look at a sound pattern of a native speaker speaking you can't usually tell the breaks between words. It is something of a continuous wave pattern. Our brain is doing the hard work of parsing into words.

It is so interesting what we have idiosyncrasies in. I remember playing soccer growing up and when i arrived at practice i could tell from the parking lot who was here from a distance awqy because i could recognize people's walks and runs before being close enough to make out their faces.

It's fascinating that that would even come across in the tiny, highly constrained motion of just tapping out code.